UGC NET Questions (Paper – 1)

Replacement level fertility is the level of childbearing at which each generation of women is producing enough daughters to replace themselves. In human populations it is slightly above two children per woman in many contexts because some children die before reaching reproductive age. The stem clearly refers to fertility that allows a population to replace itself over time. Hence replacement level fertility is the correct term.

Option A:
High fertility simply indicates that women are having many children,typically well above the replacement level. Such fertility usually leads to rapid population growth rather than stability,so it does not fit the description in the question.

Option B:
Replacement level fertility is central to discussions of population stabilisation and long term demographic planning. When sustained over time and combined with balanced migration,it leads to a roughly stable population size. This makes it the most appropriate option for the stem.

Option C:
Total fertility normally refers to the total fertility rate,which is a measure of average births per woman but can be higher or lower than replacement level. It is a related statistic but not specifically the level at which replacement occurs.

Option D:
Optimum fertility is not a standard demographic measure and could be interpreted in various normative ways. It does not have the precise meaning described in the question stem,so it is not the best answer.

Renewable energy sources are those that are replenished naturally on a human time scale and are not depleted by regular use. Solar energy is derived from sunlight, which is essentially inexhaustible for human purposes. Using solar energy reduces dependence on fossil fuels and lowers greenhouse gas emissions. Therefore, solar energy is correctly identified as a renewable source, making option A correct.

Option A:
Option A is correct because solar energy relies on the continuous flow of solar radiation, which is naturally replenished each day. It does not get exhausted like fossil fuels and is considered a key pillar of sustainable energy transitions.

Option B:
Option B, coal, is a fossil fuel formed over millions of years and is non-renewable on human time scales. Once extracted and burnt, it cannot be quickly replaced.

Option C:
Option C, petroleum, is also a fossil fuel that is finite and non-renewable. Its extraction and use contribute significantly to air pollution and climate change.

Option D:
Option D, natural gas, while cleaner than coal and oil in terms of emissions, is still a fossil fuel and non-renewable. It also releases carbon dioxide when burned and can leak methane during extraction and transport.

Statements A, B, D and E are correct because they outline how poverty and environment interact in both directions and how policy can change the relationship. Overuse of resources can degrade environments, which then deepens poverty, but sustainable livelihoods, clean energy and secure tenure can reduce pressure and vulnerability. Statement C is false because the relationship is context-specific and complex, and F is false because poor communities do participate, though they may face barriers. Therefore, the correct combination is A, B, D and E only.

Option A:
Option A is incorrect as it lists only A and B and omits D and E. While A and B capture the basic two-way link, they ignore policy levers such as livelihood diversification and improved access to energy and land, which are central to breaking traps.

Option B:
Option B is correct because it covers both the negative feedbacks and the main positive interventions in the poverty–environment discussion. It also excludes simplistic or disempowering views represented by C and F.

Option C:
Option C is incorrect since it includes F and excludes D. F wrongly suggests poor communities never participate, ignoring examples of community forest management and other initiatives, while leaving out D underplays the role of sustainable livelihoods.

Option D:
Option D is incorrect as it again accepts F and excludes A. By omitting A, it fails to acknowledge how survival strategies can cause degradation, while still retaining a false statement about participation.

Statement D is the only wrong statement because eutrophication usually leads to algal blooms that can deplete dissolved oxygen and harm aquatic life rather than benefit it. Statements A, B and C correctly explain the process of eutrophication, the nature of point sources and examples of non-point sources such as agricultural runoff. Thus, identifying D only as the wrong statement matches the scientific understanding of water pollution and eutrophication.

Option A:
Option A is incorrect because it treats statement A as wrong, whereas A correctly defines eutrophication as nutrient enrichment causing excessive algal growth in water bodies. This phenomenon is widely recognised in limnology and environmental science. Misclassifying a correct definition as wrong makes this option invalid.

Option B:
Option B is correct because it pinpoints D as the single incorrect statement. Eutrophication tends to reduce oxygen levels through decomposition of algal biomass and can lead to fish kills and ecosystem degradation. Since A, B and C are accurate descriptions of relevant concepts, focusing on D only as wrong is logically consistent with the question.

Option C:
Option C is incorrect because it assumes both A and D are wrong. While D is indeed wrong, A is correct and supported by numerous environmental case studies on lakes and reservoirs. Including a correct statement in the set of wrong statements makes the combination unacceptable.

Option D:
Option D is incorrect because it groups C and D together as wrong statements. Although D is wrong, C is correct in identifying agricultural runoff and urban stormwater as typical non-point sources. Treating C as wrong contradicts standard classifications used in pollution control.

Statements A, B, C and E are correct because adequate toilets, clean water, handwashing and participatory clubs all support better health and learning outcomes. Statement D is false as school conditions clearly affect health, nutrition and ability to study. Statement F is false since poor waste management can attract vectors, create odour and contaminate the environment around schools. Hence, the combination A, B, C and E only is correct.

Option A:
Option A is incorrect as it omits E and so ignores the important role of student-led initiatives and peer learning in sustaining hygiene and environmental practices.

Option B:
Option B is correct because it includes all true statements (A, B, C, E) and excludes D and F, which wrongly deny the importance of school environment and waste management for health.

Option C:
Option C is incorrect since it omits A and underplays the gendered impact of toilet facilities on attendance, especially for adolescent girls.

Option D:
Option D is incorrect because it includes D, which is false (school environments do affect health and learning), so the combination cannot be correct.

The reported pilot at VOC Port involves a small-scale facility producing green hydrogen using renewable electricity. The hydrogen is initially used to power streetlights and an electric-vehicle charging station within the port colony, demonstrating practical, localised applications. This experiment is part of a broader push to decarbonise port operations through green hydrogen, solar and wind projects. It also supports learning for future, larger-scale deployments in the maritime sector. (The Times of India)

Option A:
This option correctly describes the scope and use-case of the pilot project, aligning with media reports on India’s first port-based green hydrogen demonstration. It therefore represents the accurate current-affairs detail and is the right answer.

Option B:
Importing grey hydrogen produced from coal would not qualify as a “green” hydrogen project and would not reduce lifecycle emissions. The pilot at VOC Port specifically focuses on hydrogen produced from renewable energy.

Option C:
Building a dam to store fossil fuels has no connection with hydrogen technology or decarbonisation. It is inconsistent with the described green-energy initiatives underway at the port.

Option D:
Replacing solar panels with diesel generators would increase emissions and undermine sustainability goals. In reality, VOC Port has expanded its solar capacity and added wind power alongside the hydrogen pilot.

Statements A, B, D and E correctly reflect widely accepted descriptions of sustainable development, including the classic definition, three-pillar approach, equity dimensions and participatory decision-making. Statement C is incorrect because sustainable development stresses prudent and efficient resource use, not unlimited exploitation. Statement F is also incorrect since reducing poverty and inequality is integral to the sustainable development agenda. Therefore, the only combination that includes all and only the correct statements is A, B, D and E.

Option A:
Option A is correct because it selects the four statements that match key principles of sustainable development. It recognises the need to balance present and future needs, integrate economic, social and environmental goals and ensure fairness across and within generations. It also acknowledges the role of stakeholder participation, while rejecting resource overuse and neglect of poverty.

Option B:
Option B is incorrect as it adds C, which advocates unlimited exploitation of resources. Including C contradicts the very idea of sustainability, even though A, B and D are correct. It also omits E, so it leaves out the participatory aspect.

Option C:
Option C is incorrect because it accepts both C and F, which misrepresent sustainable development as endorsing unlimited exploitation and ignoring poverty/inequality. Although it includes some true statements (B and E), the presence of C and F and absence of A and D make the combination invalid.

Option D:
Option D is incorrect since it brings in F along with A, D and E. While A, D and E are true, F wrongly states that poverty and inequality concerns are ignored. This mixture of true and false statements prevents it from being the correct answer.

NGOs are important actors in civil society who often work on environmental issues. They organise campaigns to raise public awareness, support local communities in protecting resources, conduct independent research and lobby governments and businesses for better environmental standards. Their activities can complement official efforts and hold institutions accountable. Thus, the statement that NGOs create awareness, mobilise communities, research and advocate for stronger policies accurately describes a constructive environmental role.

Option A:
Option A is incorrect because NGOs are not limited to executing government directions. They frequently initiate their own projects and can critically engage with government policies.

Option B:
Option B is correct as it recognises the multiple functions NGOs perform in environmental governance, from field-level work to national and global advocacy. Their independence allows them to bring diverse perspectives into policy debates.

Option C:
Option C is incorrect since environmental clearances are granted by designated government authorities, not by NGOs. While NGOs may comment on or challenge clearances, they do not issue them.

Option D:
Option D is incorrect because working solely for industrial profit maximisation would conflict with the typical mission of environmental NGOs, which is to safeguard ecological and community interests.

The IPCC is a scientific body established by the UN to provide policymakers with regular assessments of the science of climate change. It reviews and synthesises thousands of research studies on physical science, impacts, adaptation and mitigation. Its comprehensive assessment reports inform international negotiations and national policy but do not themselves set rules. Thus, the primary role of assessing and reporting on climate knowledge, as described in option C, is accurate.

Option A:
Option A is incorrect because treaty negotiation and adoption are functions of political bodies like the Conference of the Parties to the UNFCCC, not of the IPCC. The panel supplies information but does not make binding legal decisions.

Option B:
Option B is incorrect since financing renewable energy projects is handled by entities such as the Green Climate Fund and development banks. The IPCC does not manage project funding.

Option C:
Option C is correct as it emphasises the assessment and reporting role. By summarising peer-reviewed science in an accessible way, the IPCC helps bridge the gap between researchers and policymakers without advocating specific policies.

Option D:
Option D is incorrect because enforcing penalties on countries is not within the IPCC’s mandate. Compliance and enforcement issues are addressed within international agreements and national laws.

Statements A, B and D are correct because ICT tools like remote sensing and GIS help monitor environmental change, ICTs improve information flows and green technologies need supportive policies and capacities. Statement C is incorrect as technology does not guarantee sustainability; outcomes depend on design, context and use. Hence, the combination A, B and D only is correct.

Option A:
Option A is incomplete because it omits D, which rightly emphasises that enabling policies and capacity building are essential for adoption of environment-friendly technologies. Without D, the role of governance and institutions is underestimated.

Option B:
Option B is incorrect because, although B and D are true, it leaves out A which reflects one of the most important environmental applications of ICT, namely remote sensing and GIS. The combination is therefore only partially correct.

Option C:
Option C is correct since it selects the three true statements and excludes C, which wrongly assumes automatic sustainability from any new technology. It aligns with a critical understanding of technology–environment relationships.

Option D:
Option D is incorrect as it includes C along with the true statements. Accepting C implies that the mere presence of technology ensures sustainability, which is conceptually flawed.

In tourism studies,carrying capacity refers to the level of visitor use an area can sustain without unacceptable environmental degradation or decline in visitor satisfaction. The stem directly mentions this maximum number of visitors without serious impacts. Therefore carrying capacity is the correct term.

Option A:
A footprint generally measures resource use or environmental impact per person or activity,such as ecological or carbon footprint. While related,footprint does not specifically denote the maximum acceptable number of visitors at a site.

Option B:
Carrying capacity helps planners decide how many tourists a site can host while maintaining ecological integrity and quality of experience. It is central to sustainable tourism management and fits precisely with the description in the question.

Option C:
The multiplier in tourism refers to the indirect and induced economic effects of tourist spending. It is an economic concept rather than an environmental limit. Hence it is not an appropriate answer here.

Option D:
Concentration could loosely describe the density of tourists in a particular area but does not embody the idea of a threshold beyond which impacts become unacceptable. Therefore it does not match the stem.

Organic farming emphasises the use of organic manures, green manuring, crop rotations and biological pest control instead of synthetic chemicals. These practices enhance soil organic matter, improve structure and support beneficial organisms such as earthworms and microbes. Diversified cropping systems also promote on-farm biodiversity. Consequently, increased soil health and biodiversity through organic inputs and rotations is a key environmental advantage of organic farming.

Option A:
Option A is incorrect because organic systems deliberately avoid heavy use of synthetic fertilisers and pesticides. They seek to maintain fertility and pest control through ecological processes rather than external chemicals.

Option B:
Option B is correct as it highlights how organic practices build soil organic matter and encourage diverse life forms. This leads to better nutrient cycling, water retention and resilience against erosion and pests.

Option C:
Option C is incorrect since organic farming usually discourages strict monocultures and encourages mixed cropping and rotations. Monocultures with high inputs are more characteristic of conventional intensive agriculture.

Option D:
Option D is incorrect because organic yields can vary and may be lower than conventional yields under some conditions. The approach focuses on sustainability and quality rather than guaranteeing maximum yield in all circumstances.

The Environment (Protection) Act, 1986 serves as an umbrella law that gives the central government broad powers to protect and improve the environment. It authorises the setting of standards, regulation of industrial locations and discharges, control of hazardous substances and issuance of directions. Thus, it provides a comprehensive framework rather than dealing with a narrow issue alone.

Option A:
Option A is incorrect because wildlife conservation is mainly covered under the Wildlife (Protection) Act, 1972; the Environment (Protection) Act has a much wider scope beyond wildlife.

Option B:
Option B is correct as it recognises the Act as a broad, empowering statute that underpins many rules on pollution control, environmental standards and impact assessment.

Option C:
Option C is incorrect since forest land diversion for projects is primarily governed by the Forest (Conservation) Act, 1980, not by the Environment (Protection) Act alone.

Option D:
Option D is incorrect because pollution control boards were created mainly under the Water and Air Acts; the 1986 Act goes beyond merely setting up such institutions.

Ecological overshoot occurs when humanity’s or a population’s demand on ecosystems exceeds what those ecosystems can regenerate in a given period. This leads to depletion of natural capital and accumulation of wastes. The stem clearly references footprint exceeding biocapacity,which is the defining condition of overshoot,so this is the correct term.

Option A:
Equilibrium would imply a balance between demand and regenerative capacity,which is the opposite of the situation described. Thus it cannot accurately fill the blank.

Option B:
Overshoot highlights that society is drawing down stocks of resources and filling waste sinks faster than they can recover. This unsustainable trajectory eventually forces either ecological or social adjustments. The explanation fits exactly with the question’s scenario.

Option C:
Neutrality suggests no net impact or balance, such as carbon neutrality, and does not convey the idea of exceeding capacity. Therefore it is not the proper term here.

Option D:
Substitution refers to replacing one resource or technology with another. While it may help address overshoot,it is not the name of the condition in which demand surpasses biocapacity.

Statements A, B, D and E are correct as they describe voluntary rights-based approaches, links with reproductive health, synergies with environmental initiatives and the importance of women’s empowerment. Statement C is incorrect because coercive measures violate human rights standards. Statement F is also incorrect, since demographic trends influence resource demand and sustainable use. Thus, the combination that includes A, B, D and E only is the correct one.

Option A:
Option A is incorrect because it leaves out E, thereby ignoring the role of women’s empowerment in shaping fertility and environmental outcomes. Although A, B and D are correct, they do not provide a complete picture.

Option B:
Option B is incorrect as it includes F, which wrongly states that population policies have no relevance for sustainable resource use. This contradicts analyses that link demographic trends with resource pressure.

Option C:
Option C is correct since it brings together all statements that reflect rights-based, gender-sensitive and environment-linked population policy discussions. It explicitly excludes C and F, which endorse coercion or deny resource linkages.

Option D:
Option D is incorrect because it adds F and excludes A. Accepting F would deny important connections between population and environment, while losing A omits a basic function of population policy.